My bestie turned into an enemy after 16 years. We were like sisters and even worked together, but I kept catching her talking so much trash about me especially when she didn't get her way. It was always a guilt trip from hell and it was a lot of emotional manipulation because I was a doormat. It took me a long time to actually stand up to her, but I did. Apparently my boundaries made me "fake" because she got too used to me being a pushover. I cut her off 4 years ago and never spoke to her again.